Wireless Frequency: 433 MHz / Flash triggering range up to 30 meters / 16 Channels Selectable / Flash Sync Speed up to 1/250 second Dual-Function Trigger: Can wirelessly trigger flash/studio light or camera. Please note when it is used to wireless or wired trigger a camera's shutter release, it requires a separate purchase of a JJC camera release cable to fit the particular camera as it is not included in the packaging This flash trigger does not support I-TTL mode, so use your flash with full Manual control. The trigger won't work properly if your flash is under TTL mode In the box: 1x Transmitter (powered by 23A battery), 1 x Receiver (powered by AAA battery), 1 x 2.5mm to 3.5mm PC flash sync cord, 1 x 3.5mm to 6.35mm adapter(for connecting to a studio light) Compatible with flashes: Canon 600EX RT / 580EX II / 580EX / 540EZ / 520EZ / 430EX II / 430EX / 430EZ / 420EX / 420EZ / 380EX; Nikon SB-910 / SB-900 / SB-800 / SB-600 / SB-28 / SB-27 / SB-26 / SB-25 / SB-24; YongNuo YN560III / YN600EX-RT / YN-560II/ YN-565EX / YN-568EXII / YN560IV, Olympus FL-50R / FL-50 / FL-36R / FL-36 and other standard shoe mount flashes models with a trigger voltage below 12 V. (Please note this flash trigger doesn't work with Nikon SB400 and Nissin flashes)